Figure 1
Geographical location of the Yiyuan hominin site. (a) Location of Yiyuan and some other contemptuous Mid-Pleistocene Homo (circles) and H. erectus (squares) sites in China, the sites are: 1. Xujiayao; 2. Zhoukoudian locality 4; 3. Jinniushan; 4. Miaohoushan; 5. Dali; 6. Lingjing; 7. Chaoxian; 8. Panxian Dadong; 9. Maba; 10. Panlong Cave; 11. Zhoukoudian locality 1; 12. Chenjiawo (Lantian); 13. Bailong Cave; 14. Hexian; 15. Tangshan. (b) Topographic map of the adjacent region of Yiyuan site, the white solid line marks the boundary of the drainage area of Ciyu River, the dashed line indicates a boundary between different base rock outcrop zone in the drainage area, the northern part is Paleoproterozoic granite while the southern part is Ordovician limestone. (c) Image showing the location of two human fossil-bearing localities of Yiyuan site, and the sampling position of YYB-0. Maps in a and b were generated using Global Mapper (www.bluemarblegeo.com) based on free ASTER GDEM v2 worldwide elevation data (http://glcf.umd.edu/data/aster/), image in c was from Google Earth & Digital Globe.
